Silentnight Memory 800 Pocket Super King Mattress
The Silentnight Memory 800 Pocket is a hybrid mattress that pairs a memory foam comfort layer with 800 Mirapocket springs, which means you get pressure relief on top and independent, zoned support underneath.
- Eases pressure at shoulders & hips
- Medium feel suits back & side sleepers
- 60-night trial & 5-year guarantee
£428
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Silentnight Memory 800 Pocket Mattress
More available sizes
Mattress details
Mattress
Silentnight Memory 800 Pocket Mattress
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
24
Layers
2
Layer Details
Memory foam
The top layer gently moulds to the contours of your body, which means pressure points like hips and shoulders feel cushioned rather than pressed against the springs. It provides that slow, hugging comfort memory foam is known for.
Mirapocket springs
Beneath the foam, 800 Mirapocket springs respond independently to your movements, giving zoned support and improved spinal alignment. Because each spring works on its own, motion transfer across the bed is reduced.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- Distance from a restless partner: With 90cm each for two people sharing, a partner who turns all night is simply further away, and the space matters as much as any comfort layer.
- Springs that keep movement local: The 800 Mirapocket springs compress independently, which means the wriggling on one side of a bed this wide barely registers on the other.
- Room for the whole household: When a child pads in at 3am or the dog claims a corner, this width still leaves both adults a proper share of the mattress.
- Pressure relief across the full width: The memory foam top layer moulds to shoulders and hips wherever you end up, useful when sleepers spread out across a bed this size.
- A medium feel most couples can agree on: Silentnight rates it medium, a sensible compromise when two people with different preferences are choosing one large mattress together.
This size suits you if...
You share the bed every night and one of you is a genuinely restless sleeper, or your children or pets treat the bed as communal and you want everyone to still get a decent share. It also makes sense if you have a large master bedroom, perhaps in a period property, where a UK king would look and feel undersized.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest as a minimum for this size. The UK king would suit you better: it's 30cm narrower but the same length, and needs at least 2.7m x 2.9m.
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FAQ's
Is the Silentnight Memory 800 in a UK super king good for restless couples?
Yes, and it's one of the stronger cases for this size. The 800 pocket springs respond independently, so movement doesn't travel far across the bed, and with 90cm each for two people sharing there's simply more distance between you. Space and spring design work together here: a restless partner becomes much easier to sleep through.
How much space does each person get on a super king Silentnight Memory 800?
Two people sharing get 90cm each, the most of any standard UK size. That's enough for both sleepers to stretch out, change position or edge away from a duvet thief without touching. On the Memory 800 specifically, the memory foam layer cushions pressure points wherever you settle, so you're comfortable across the full width rather than pinned to one spot.
Should I choose the Silentnight Memory 800 in a UK king or UK super king?
The UK super king is 30cm wider than the UK king, and the two are the same length. If children or pets regularly join you, or one of you is a light sleeper next to a fidgeter, that extra width is where this mattress makes the most sense. We suggest at least 3m x 2.9m of room for the UK super king, and at least 2.7m x 2.9m for the UK king.
Is the super king Memory 800 suitable for sharing with children or pets?
It's a sensible pick for exactly that. At 180cm wide there's room for a child who wanders in at night, or a large dog with a fixed routine, without either adult losing their share. The independent pocket springs also help: a small body climbing aboard at 3am creates far less disturbance than it would on an open-coil mattress.
Where can I find the best price on the Silentnight Memory 800 super king?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so the cheapest option today may differ from last week, particularly around sale periods. Because the super king is the largest size in the range, the gap between the highest and lowest price is often bigger than on smaller sizes, so it pays to check before ordering.